Router_D#show ip ospf database network
OSPF Router with ID (172.20.0.1) (Process ID 1)
Net Link States (Area 0)
Routing Bit Set on this LSA
LS age: 1590
Options: (No TOS-capability, DC)
LS Type: Network Links
Link State ID: 172.19.0.2 (address of Designated Router)
Advertising Router: 172.20.0.1
LS Seq Number: 80000002
Checksum: 0xE84A
Length: 32
Network Mask: /16
Attached Router: 172.20.0.1
Attached Router: 172.19.0.1